Re: Simple math failing - PHP Bug?

On Monday 01 November 2004 04:52, Brian T. Allen wrote: > OK, I'm totally stumped by this. This should be the simplest math > imaginable (addition and subtraction), but PHP is coming up with the > wrong answer! > > I've checked on 3 different machines (all linux) running both PHP 4 and > PHP 5. > > Here is the code to duplicate the problem: [snip] > Now I'm the first to admit that 0.000000000000284217094304 and 0 are > really very close, but when you are testing a variable to see if it > equals 0, it is the difference between true and false. > > This seems very, very basic to me, but I can't find the flaw in my code. > > Is this legitimately bad math on the part of PHP? Most computer languages handling floating point calculations just as poorly. If accuracy is important use the BCMath functions. -- Jason Wong -> Gremlins Associates -> www.gremlins.biz Open Source Software Systems Integrators * Web Design & Hosting * Internet & Intranet Applications Development * ------------------------------------------ Search the list archives before you post http://marc.theaimsgroup.com/?l=php-general ------------------------------------------ /* BOFH Excuse #332: suboptimal routing experience */